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15 sie 2024 · In the lungs, the smallest of blood vessels, called capillaries, are the site where carbon dioxide is removed and oxygen obtained from the alveoli, the smallest structures of the respiratory tree. From the capillaries, blood enters the bronchial veins, which then drain into the pulmonary veins.
The pulmonary venules are responsible for returning oxygenated blood from the lung tissue to the pulmonary veins, which subsequently will transport it back to the left atrium of the heart. The extensive network of capillaries surrounding the alveoli are drained by the pulmonary venules.
18 cze 2023 · Alveoli are tiny, balloon-shaped air sacs located at the end of the bronchioles, the branch-like tubes in the lungs. The alveoli move oxygen and carbon dioxide (CO 2) molecules into and out of your bloodstream. This article discusses the structure and function of the alveoli.
14 sie 2023 · Structure and Function. The pulmonary veins originate from individual alveoli within the lung as capillary vessels. These capillary systems converge into larger veins called the interlobar pulmonary veins.
Alveoli make up the functional tissue of the mammalian lungs known as the lung parenchyma, which takes up 90 percent of the total lung volume. [3][4] Alveoli are first located in the respiratory bronchioles that mark the beginning of the respiratory zone.
The respiratory zone includes the structures of the lung that are directly involved in gas exchange: the respiratory bronchioles and alveoli. The lining of the conducting zone is composed mostly of ciliated pseudostratified columnar epithelium with goblet cells.
1 maj 2023 · This schematic longitudinal section of a primary lobule of the lung includes the respiratory bronchiole, alveolar duct, atria, alveolar sac, alveolus or air cell, pulmonary artery, pulmonary vein, lymphatic, and lymph node.
